Stove construction



May 1, 1923. 1,453,710

R. HOFFMAN STOVE CONSTRUCTION I Filed March 24 1922 2 Sheets-Sheet 1 May 1, 1923.

R. HOFFMAN STOVE CONSTRUCTION Filed March 24, 1922 2 Sheets-Sheet 2 To all whom it may concern:

Fatented May 1, 1923. 1 UNITED TsTATEs PATENT RUDOLPH mm, or ILLINOIS, AssIGNoR' o'sEAns, noneocx AND 00., or 'cmcaeo, ILLINOIS, A CORPORATION OF YORK.

sTovn CONSTRUCTION.

Applicationfile'd March 24, "1&2. Serial NO. 546,335.

Be it known that I, RUD LPH HOFFMAN,

" a citizen ()fthe United States, residing at.

' dencyof the heavy enamel finish provided actions during the assembling.

Kankakee, in the 'county'of Kankake'e and' State of Illinois, have invented a certain new, and useful Stove Construction, of which the following is a specification.

This invention relates, in general, to .stoveconstructions and has more particular reference.to an improved construction for'the oven or ovens and asociated parts of cook stoves. 4

In constructions of this character provided in the past, considerable difii'culty arose in the assembling of the ovens due to the tenon the work to crack and break off in patches particularly at the joint betweencontiguous of the present invention is to obviate such contingencies andto provide a practical construction presenting a neat workmanlike appearance. I

Another undesirable gcharacteristic ofprior constructions which 'it is the aim of presented by the rusting'of certain portions therein exposed to view when the oven door is open'. The-invention provides for these portions'of' the oven, 2. facing of a noncorrosive metal which, besides obviating" these undesirable features, considerably en hances the appearance of' the oven.

These and other objects. of he invention are 'attainedby the construction and ar-' I .having;'superimposed ovens constructed in accordance with the. invention. Fig. 2 is a fragmentary vertical sectional: detall of-the forward part of the ovens, the lower oneof which has'its (look-removed. Fig. 3 is' a fragmentary horizontalsectional detailof 1 v partition 26 preferably of a single piece of 'sheet metal resting'atuts. forwardend upon the lower oven taken on the line 3---;3 of Fig. 2.- Fig.4is a fragmentarydetailpartly .in section and partly in elevation of the upper portion of -the ovens and adjacent portions of'the stove structure and is taken .'on the line 4- 1 of Fig; 1. Fig. 5 is a perspective detail of a piece of the facing em;

ployed for covering the cross piece between the upper and lower ovens. 1g. .6 is a similar view ofthe facing employed for coveringcthe door jambs within the ovens, and Figs. 7, 8 and 9 are perspective details respectively of the frame structure of thefor- "oven '10 and a lower or broiler oven 11 pro I vided respectively with oven doors 12 and 13. I One object I The oven structure has at its forward end a sheet metal frame 14 provided with a cross piece 15 also preferably of sheet metal. The oven side walls 16v and 16 have inturned, forward'edge portions interfitting with inv and fastened thereto by bolts 17 enteringthe front of the frame (see Fig.3). The frame '14 has the oven openings 18 and 19 defined by the cross piece 15which are arranged to be. closed the oven doors 12 and 13, respectively.- The oven doors may, ofcourse, be of any suitable type although .I prefer those having spring-operated means for moving the same, such'n'ieans being herein enclosed within ornamental housings 20 at opposite sides of the doors. The doors, fur thermore, haverstop fingers 21 entering slots '22 provided-inthe cross piece 15 of the frame 14 serving as limiting abutments for the 'stopfingers when the 'door is swung out,

in a well known manner." The openings, 18 and '19 are further defined by inturnededge portions on the frame 14 -and cross piece 15 24 for the oven doors and projected inwardly from the j ambs '24 are flanges 25, the purturned side edge portions of the frame 14 1 forming rabbeted grooves 23 and jambs pose of. which will presently be made to appear. The oven doors entering the rah bet-ed. grooves 23 effectually seal the ovens. Theovens l0 and 11 are separated by a a step 27 provided integral withthe upper purposes of heat insulation toprovide double walls in the oy en doors and all enclosing walls. In the present construction the bottom of the oven 11 is thus shown as provided at 28 in spaced relation to the bottom outside wall 28. which is secured together with the lower edgeof the 'frame 14 to the base 29, suitably by bolts "30. In a similarmannei the side walls of the ovens are provided at 31 in s paced relation to the outer side walls 16 and 16' and the upper wall of the oven 10 is-provided at 32 in-spaced re" lation ,to the outer upper wall 33. These constructions so far as they have been generally described are old and no invention is here claimed therein. c

The top wall 33 is secured to the frame 14 b bolts 17 similarly as the side walls as sli own in Fig. 2 and has depending side portions 34 projecting in the plane ofthc side walls as shown'in Fig. 4. At a point spaced from the top wall 33 the side portions 34 have inturned edge portions 35. The latter are adapted to engage with similar inturned edge portions 36 of the side walls and to be secured together therewith by bolts 37 bn the inside. With this type of construction the side walls are flnsh and present a neat appearance unmarred by bolt hea Furthermore'l have found'that the grating of portions of the walls upon one another, the flexing and bending and the torsional stresses set up in the walls which, where the edges of the oven wall sections simply overlap, cause cracking and breaking off of the heavy enamel finish usually provided on such walls, is avoided due to the fact that all I strains are placed directly upon and are borne by the inturned edge portions.

On the side toward the shelf 38 I prefer to provide a finishing strip 39 for the joint between the top wall 33-=and the side wall, as shown in F I and 4. The strip 39 is preferably made of sheet metal having a laterally projecting tongue portion 40 ex'- tended in between the inturned edge portlons 35 and 36 to, be secured t ther with these portions by the bolts37. The transverse portion on the outside is adapted to lap the joint and thus to present a neat trim V appearance. In order to secure rounded edges on this-portion of the strip I prefer to form e same as shown in Fig. 4 by bending a portion at right angles to the tongue,

'40 and then bending the metaltwice upon itself,,thus completing a T-shaped strip presenting rounded edges on the transverse portion, Atrimming 41 presenting an appear ance similar to the facing;39 and placed co-' extensive therewith is preferably provided The heat in the ovens is not generally sufficient .to affect the enamel finish of the outside walls because of the double wall construction on all sides. The cross piece 15,

however, it be seen is directly subjected on the skirt of the shelf 38. i T

upon the preparation of food in the ovens: 'To avoid these contingencies I- provide no enamel finishon the cross piece 15 but cover the same with a sheet metal facing 42, a perspective detail of which appears in Fig. 5. The latter comprises an intermediate channel shaped portion 43 and integral channel shaped side portions 44 as appears in crosssection in Fig, 2. Only the intermediate portion 43 covering the face of the cross piece 15 remains exposed when .the oven doors are closed. The upper side portion 44 of the facing 42 an additional flange 44? to be'bent over upon'the terminal edge'of the step 27 as shown in Fig. 2, whereby to secure the one sideedge of the facing in place. The side portions 44 it will be ,seen cover the lower jamb in the upper oven and the upper jamb in the lower oven. The facing 42 has slots 45 provided therein to regh ister with theslots 22 provided in the crossiece 15 of the frame-14 to receive the stop gers 21 of the .oven door 12. Preferably the housings 20 containing the means for 4, n

operating the-oven doors have extensions to cover the outer ends of the facing 42"tof present a finished appearance. The facin 42 is preferably of a non-corrosive meta such, for example, as aluminumjwhich, be'-- sides presenting a neat trim appearance, in

certain instances blending with .the color of the enamel provided on the stove, is/substantially impervious to the heat in the oven.

"Similarly to the''facing 42, a facing 47 il lustrated in perspective in Fig. 6 is provided for the door .jambs within the ovens. Since. the facing 42 covers the lower jamb of the .upper oven and the upper jamb of the lower oven, the facings 47 are provided of a U shape for covering the remaining three walls in each of the ovens. I prefer to form the 'facings '47 of frames made of strips of sheet metal having-channel shaped cross section, the opposite flanges 48 and 49'of which may be cut as shown at 50 in Fig, 6, up to (but riot through) the intermediate connecting web portion 51 so that the strip may be bent with the web portion 51 forming the inner" peripheral wall of the frame. When bent in 2 each of the corners of the frame between the flanges of the adjacent sides of the frame.- 0 close these notches I- prefer to provide? corner plates 53 having angularly extending; portions 54 extending longitudinally along the inner side of the flanges 48. Co-

lln

'this manner there is opened a not ch 52 at extensive with these portions and formed A 7 from the same piece of metal, the latter being initially substantially rectangular in shape, are wing portions 56 and 57 provided. by cutting diagonally partway across the p ate 53 and bending the portions on opposite sides of the cut in angular relationto the angularly extendingportions 54 and 55 so that the wing portions embrace adjacent sides-of the frame and are disposed in engagement with the connecting web portion 51 thereof. Theportions 54, 55, 56 and 57 are all preferably welded or otherwise held to the flanges 48 and the connecting web portion 51 to provide a rigid structure.

The frames are entered into the ovens with the flange48 covering the face of the jamb 24 (see .Figs. 2 and '3). The opposite and inner flange I9 is then bent over the terminal edge of the. inwardly projected flange 25 thus securing the facing in place permanently in the oven.

The jamb portions of the frame-Hand associated parts disposed within the oven and hence subject at all times to the heat therein have ordinarily been found to corrode in time so that an unsightly and insanitary appearance was presented when the oven doors were. opened. Thezfacing herein provided is preferably of a noncorrosive metal such, for example, as aluminum, which is substantially impervious to the heat in the oven. In this way the undesirable feature noted is obviated. Furthermore 't he facings' serve as trimmings and considerably enhance the appearance of the open ovens. I

It will be understood that while the inventionhas been illustrated and described ,with considerable particularity, it is contemplated that various changes may be made in the details of construction and arrangementwithout departing substantially from the spirit and scope of the iifvention as expressed in the appendedclaims,

I claim as my -invention. V 1. In a stoveconstruction, a sheet metal oven comprising a 'wall having an inturnededge portion, another Wall having-a portion disposed in the plane of saidfirst mentioned wallaa 'd' -having an inturned edge portion adapte fbr abutment with said first,men-- tioned portion within said oven and means for fastening said. inturned-edge portions together-inside said oven.

2. In a stove construction, a sheet metal oven comprising a wall having an'intnrned edge portion, another wall having a portion disposed in the plane of saidfirst mentioned wall and having an inturned edge portion adapted for abutment with said first mentioned portion within said oven, means. for

fastening said inturned edgeportions together inside saidoven, and a strip adapted to be interposed between said, abutting edge portions having-1a transverse portion serv ing as a finishing piecei- 'for covering the 4. In a stove construction, .a-sheet metal x oven having enameled topv and side walls, 80

said top wall comprising depending side portions extendin in the plane of said side walls and having inturned edge portions extending therefrom, said side walls having" similarly inturned edge portions adapted for abutment with said first mentioned edge portions, and securing means passed through said edge portions to' fasten the same togetherJ said top wall comprising depending side portions extending in the plane of said side walls and having inturned edge portions extending therefrom, said side walls having similarly- -inturned edge portions adapted for abutment with said first mentioned edge portions, securing means passed through said edge portions to fasten the same together, and a finishing piece adapted to be fitted in the joint between said edge portions on the outside of said side wall, said piece having a'lateral projection adapted to be entered between said edge portions to bejsecured thereby; Y

I 5. In a.' stove construction, the combination' with two contiguous wall sections hav ing inturned edge portions for fastening said sections together, of a. finishing piece for closing the joint between said sections on 1 the outside comprising a tongue adapted to I be interposed between said inturned edge portions to be fastened thereby. f

6. In a stove construction. the combination with two contiguous wall sections having inturned edge portions for fastening said sections together, of a finishing .piece for covering the joint between said sections on the outside comprising a T-shaped sheet a metal member having its'leg disposed between said inturned'edge portions for fastening said piece therebetween and having its cross piece lapping said joint, said cross piece being formed bybending the sheet, metal at right angles to said leg portion and theri twicefupon itself whereby to forms.

rounded edge cross piece of double thick-' ness to present a neat trim appearance at,

said joint. m 7. In a stove construction, the combination of a pair of ovens superimposed with a 129' single -wall partition therebetween, said ovens being open in front and provided with oven doors, a cross piece between said ovens supporting said oven partition wall,

said ovens being provided with double walls for heat insulation on all sides excepting? the front at said cross piece, said side walls being enameled on the outside to impart 'a neat appearance to said oven and a facing strip for said cross piece covering the same '1 and jamb.

v stantially 'noncorrosive an cross piece of non-corrosive metal having" wherein said ndooriis adaptedto 'with a 12, In a'stove construction,-the combinaofiall sides,exposed to view when said oven doors are open or closed, Silld facing-stuppresenting. a neat trim appearance andbeing of a'noncorrosive metal substantially impervious to the hea't of said ovens.

8. In a stove construction, the combination of Superimposed sheet metal ovens, said ovens being provided with double walls for heat insulation and having an open front and a single-Wall partition between said Iovens, a sheet metal cross piece between said ovens supporting said partition, said cross piece and said oven walls at said open front being formed with rabbeted grooves, oven doors for said ovens adaptedto enter said grooves to close said:ovens, a non-corrosive facing" strip for covering said cross piece and covering the groovetherein to prevent any portion thereof being-exposed, and facing strips fitting in the grooves in said oven walls similarly to said cross piece.

. 9. In a stove construction, the combination of ksu'perimposed sheet metal ovens,

v saidbve'ns being providedwith double walls for heat insulationa nd having an open front and a single-wall partition u between said ovens, a" sheet metal cross piecebetween said ovens supporting said/partition, said cross piece and said oven wa ls at said open front being formed with rabbeted grooves, oven doors, for saidovens adapted to .enter said grooves to close said ovens, a non-corrosive facing, strip for covering said cross piece andcovering the groove therein to prevent any portion thereof being exposed,-and facing strips fitting in the grooves in saidsoven walls similarlv to said cross piece, said last mentioned strips anda portion of said crosspiece strip being within saidoven and exposed to view onlywhen said oven doors are open.

10.- In a/stove construction, an oven having an open front and an oven dooig for closing said opening, said opening beingformed jamb forsaid door within said oven,

a facing of nonorrosive' metal. for said 1 1.. In a stove construction, an oven havmg an open front, an oven: door mounted in,

said opening,'and-.a facing for the'sides of said opening in said'oven covered by said door when closed, saidafazpng being subserving a trimming to enhance the appearance of said oven when open. I

tion of an uppe1=-.-and a" lower' oven having,

vbetween said ovens an? oven door for upper oven mounted over said cross piece 2 a 'slot therein to registerwith said first mentioned slot.

13. In a stove construction, the combination of an upper and a lowerovcn having an open front, a cross piece --in' said, opening between said upper and lower ovens, said upper oven havinga door jamb there in, an oven door for sald upper oven mounted over said cross piece and adapted to. engage. said jamb, and a facing piece for said cross piece of non-corrosive-metal, said facing piece having a side portion extending over said jamb.

14. In a .stove construction, the combinationof an npper and a loweroven having an-openrfront, a cross piece in said opening between said upper and lower ovens, said cross piece providin door jambs for thelower portion of sai ,upper ovenand the upper portion of said lower oven, oven 85 doors mountedin, said openings above and below said cross piece adapted to engage said 'jambs, a facing strip for said'cross piece of non-corros1ve metal, said facing stri having side portions extending over the ower jamb in said ;upper oven and the upper jamb in said lower oven.

15. In astove construction, the combination of an upper and a lower oven having an open front, a cross piece in said opening between said upper and lower ovens, said cross piece and the walls of said ovens about said openings being formed to provide door jambs, oven doors for said'upper and lower ovens above :and below said cross piece adapted to engage said jainbs, a facing strip for; said cross piece of non-corrosive'mai tenal having side portions extending over the lower jamb in said upper oven and the upper 'amb in saidlower oven and facing strips or the. j ambs in said ovens on the rcmaiping three sides of said openings. i

16. In a stove construction, sheet metal ovens disposed in superimposed relation hav ing double rwalls for heat insulation and having an open front, a cross piece in said opening separating the upper from the lower oven at the. partition vwall between said ovens, oven doors for cldsing said oven openings, double oven walls being enameledflfor neatnes 'in appea cc,- sajd cross piece being" especiallg not sceptible of enameling becau e $11 act to the heat-insaid ovens, said cross of non-corrosive material: substantially imperviousto the-l1eat and ,-serving aslw 11 to an ppen front, a cross piecein'said opening impart a neat tzimpp amnoe t said veil.

17. w stoveronstructigin'fithecombine an-oven ha -gfan opening in 'the 7- front wall thereof and a door? for closin said open ng, said oven having ,a sheet meta "door jamb therein set in sai oventoprovide a rabbeted groove in out-thereof,

the outer walls of certain of said piece being provided with a; facing c4 enter in jamb, and facings for said jambs compris-.

' mg strips of channel form set over said in- ;ivardly. projectin flanges so that one of the the other of the flanges thereof bein bent finin g over upon said "inwardly projecting an s to secure said strips in place, said strips eing of a non-corrosive metal substantially impervious to the heat'of the oven. v 18. In astove construction, the combination ,inan oven having an opening in the front wall thereof and a door for closin said opening, said oven having a door jambt erein setin said oven providing a rabbeted oove in front thereof .wherein said door is adapted to enter in closing, side walls desaid oven opening at the edges of said amb, and a facing strip of a single continuous length for covering said jamb, said strip beingof a channel form, the flanges of said channel being cut outin to the connecting webs-thereof to permit said strips to be bent at the corners of the oven opening, the outer flange of said strip being adapted to cover said door amb and the inner flange to be engaged over the terminaledge of the walls defining the sides of said oven openin whereby to secure said strip in place,

7 said strip being substantially impervious to the heat of the oven.

- 19. In a stove construction, aframe comprisin sides-having peripheral side walls 'exten ing in angular relationat the corners of said frame, said sides having out-turned edge ortions forming peripheral flanges on sai frame, said flanges being continuous on, the sides of said frame but providing notches at the corners between adjacent sides and reinforcing corner plates for closing said notches and strengthening said frame, said plates each comprising angularly extending portions constituting an angle, plate for spanning said-notches and engagmg'on'theinner sidespf said adjacent peripheral flan s and "wings co-extensive with saidanfufirly extending port ons of said plate a aptedto lie along sides of said peripheral side wallsg, said wings beings formed by cutting a plate art- 'galtly across toward the point where sai anarly elzlztending portions converge and ar re ing portions,

20. In a stove construction, a frame comnges-of said c annels covers said jamb,"

engaged along the outer si the outer ortions on the sides .of'the cutation to said angularly extend-' prising sides having peripheral side walls extending approximately at right an les at the corners of said frame, said sides aving outturned edge portions forming peripheral flanges on said frame, said flanges being continuous on the sides of said frame but providing notches at the corners between adjacent sides, and reinforcing corner plates for closing said notchesand strengthening said frame, said plates 'each being made of ing the adjoining edges of said' plate, said angplarly extending portions being adapted to e adjoining peripheral flangesof saidframe and said bent portions bem adapted to be es of said peripheral' side wall. c a

21. In a stove construction, a frame made of a continuous sheet metal strip having an inner wall to form the sides of said frame and an integral flange on one edge of said wall to form peripheral flanges on said frame, said flange being cut transversely whereby w permit bending ,of said inner wall at the corners of saidiframe, said out.

when open forming a notch" upon the bending of said frame at each of the corners of thelatter, sheet metal cornerlates for said engaged along the inner sides of said stantially rectangular plate diagona y partway across and bendin the portions on each side of the cut at ang es :to said angularl extending portions, said angularly exten ing portions being adapted to be engaged with said peripheral flanges on opposite sides 4 -of said notches and said bent portions ing adapted to be engaged withisaidtinner wall whereby to close said notches and to reinforce said frame.

22. In a stove construction,'the eombina-i tion of an ovenhaving two contiguous wall sections secured together upon the inner "side of the oven and. forming a joint, a shelf extendin laterally from .said' oven ad'acent said joint, and finishingmeans inclu ing a portion covering said joint in said wall and a second portion coextensive with thefirst and extending along the front of said shelf. In testimony whereof, I have hereunto aflixed my signature.

RUDOLPH :HOFFMAN, 

